Abaixo está uma instrução que descreve uma tarefa de geração de SQL, combinada com uma entrada que fornece mais contexto sobre os esquemas de tabela disponíveis. Escreva o código SQL que responda adequadamente à solicitação
 ###Instrução: Quando a tarifa de Saginaw é de $470.47, qual era a tarifa para Grand Rapids?
 ###Tabelas: CREATE TABLE 1993 (1993_id AUTO_INCREMENT PRIMARY KEY, Overall Episode # INT, Original airdate VARCHAR, Iron Chef VARCHAR, Challenger VARCHAR, Challenger Specialty VARCHAR, Theme Ingredient VARCHAR, Winner VARCHAR) CREATE TABLE competition (competition_id AUTO_INCREMENT PRIMARY KEY, Year INT, Lansing (LAN) VARCHAR, Detroit (DTW) VARCHAR, Grand Rapids (GRR) VARCHAR, Flint (FNT) VARCHAR, Kalamazoo (AZO) VARCHAR, Saginaw (MBS) VARCHAR) CREATE TABLE season_7:_1943_—_1944 (season_7:_1943_—_1944_id AUTO_INCREMENT PRIMARY KEY, Episode VARCHAR, Title VARCHAR, Writer(s) VARCHAR, Preservation VARCHAR, Original airdate VARCHAR) CREATE TABLE michigan_48_ohio_northern_0 (michigan_48_ohio_northern_0_id AUTO_INCREMENT PRIMARY KEY, Player VARCHAR, Position VARCHAR, Starter VARCHAR, Touchdowns INT, Extra points INT, Field goals INT, Points INT) CREATE TABLE ap_poll (ap_poll_id AUTO_INCREMENT PRIMARY KEY, Preseason VARCHAR, Week 1 Aug 26 VARCHAR, Week 2 Sept 2 VARCHAR, Week 3 Sept 8 VARCHAR, Week 4 Sept 15 VARCHAR, Week 5 Sept 22 VARCHAR, Week 6 Sept 29 VARCHAR, Week 7 Oct 6 VARCHAR, Week 8 Oct 13 VARCHAR, Week 9 Oct 20 VARCHAR, Week 10 Oct 27 VARCHAR, Week 11 Nov 3 VARCHAR, Week 12 Nov 10 VARCHAR, Week 13 Nov 17 VARCHAR, Week 14 Nov 24 VARCHAR, Week 15 Dec 1 VARCHAR, Week 16 Dec 8 VARCHAR, Week 17 (Final) Jan 4 VARCHAR)  
SELECT Grand Rapids (GRR) FROM competition WHERE Saginaw (MBS) = $470.47